error: numeric character escape is too short
  --> $DIR/lex-bad-char-literals-1.rs:3:8
   |
LL |     '/x1' //~ ERROR: numeric character escape is too short
   |        ^

error: numeric character escape is too short
  --> $DIR/lex-bad-char-literals-1.rs:7:8
   |
LL |     "/x1" //~ ERROR: numeric character escape is too short
   |        ^

error: unknown character escape: /u{25cf}
  --> $DIR/lex-bad-char-literals-1.rs:11:7
   |
LL |     '/●' //~ ERROR: unknown character escape
   |       ^

error: unknown character escape: /u{25cf}
  --> $DIR/lex-bad-char-literals-1.rs:15:7
   |
LL |     "/●" //~ ERROR: unknown character escape
   |       ^

error: aborting due to 4 previous errors